ac relay replace TOYOTA CAMRY V20 1986 Service Information

6. INSPECT RELAY ºCº OPERATION
(a) Apply battery voltage to terminals 5 and 6.
(b) Check that there is continuity between terminals 1
and 3.
If operation is not as specified, replace the relay. 3. INSPECT RELAY ºBº CoNTIN'U1TY
(a) Check that there is continuity between terminals 5
and 8.
(b) Check that there is no continuity between terminals
2 and 3.
If continuity is not as specified, replace the relay.
5. INSPECT RELAY ºCº CONTINUITY
(a) Check that there is continuity between terminals 5
and 6.
(b) Check that there is no continuity between terminals
1 and 3.
If continuity is not as specified, replace the relay. 2. INSPECT RELAY ºAº OPERATION
(a) Apply battery voltage to terminals 5 and 7.
(b) Check that there is continuity between terminals 3
and 4.
If operation is not as specified, replace the relay.
4. INSPECT RELAY ºBº OPERATION
(a) Apply battery voltage to terminals 5 and 8.
(b) Check that there is continuity between terminals 2
and 3.
If operation is not as specified, replace the relay.
± BODY ELECTRICAL SYSTEMHeaterBE±51

Door Lock Solenoid
INSPECTION OF DOOR LOCK
SOLENOID
1. INSPECT SOLENOID OPERATION
(Front and Rear door)
(a) Connect the positive (+) lead from the battery to
terminal 4 and negative(±) lead to terminal 3, check
that the solenoid operation in the lock (Pull) direction.
(b) Check that there is no continuity between terminals
1 and 2.
(c) Connect the positive (+) lead from the battery to termi-
nal 3 and negative (±) lead to terminal 4, check that
the solenoid operation in the unlock (Push) direction.
(d) Check that there is continuity between terminals 1
and 2.
If operation is not as specified, replace the solenoid.
(c) Connect the positive (+) lead from the battery to ter-
minal 4 and negative (±) lead to terminal 2, check that
the solenoid operation in the unlock (Push) direction.
(d) Check that there is continuity between terminals 1
and 3.
If operation is not as specified, replace the solenoid. (Back door)
(a) Connect the positive (+) lead from the battery to
terminal 2 and negative (±) lead to terminal 4, check
that the solenoid operation in the lock (Pull) direction.
(b) Check that there is no continuity between terminals
1 and 3. (d) Reverse the polarity of the voltmeter leads.
(e) Set the door lock manual switch to LOCK, check that
the voltage rises from 0 volts to battery voltage for
approximately 0.2 seconds.
If operation is not as specified, replace the relay.
± BODY ELECTRICAL SYSTEMDoor Lock Control SystemBE±60

Moon Roof Motor
INSPECTION OF MOTOR
INSPECT MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to term
inall andnegative(±)lead toterminal2,check that
the motor turns.
(b) Connect the positive (+) lead from the battery to
terminal 2 and negative (±) lead to terminal 1, check
that the motor turns the opposite way.
If operation is not as specified, replace the motor.
Moon Roof Control Relay
INSPECTION OF RELAY
INSPECT RELAY VOLTAGE AND CONTINUITY
(a) Disconnect the relay connector and inspect the con-
nector on the wire harness side as shown in the
chart.
Limit Switch
INSPECTION OF SWITCH
INSPECT SWITCH CONTINUITY
(a) Check that there is continuity between terminals 1
and 4 when the switch is ON.
(b) Check that there is no continuity between terminals
1 and 4 when the switch is OFF.
If continuity is not as specified, replace the switch.
MOON ROOF
Moon Roof Switch
INSPECTION OF SWITCH
INSPECT SWITCH CONTINUITY
Inspect the switch continuity between terminals.
If continuity is not as specified, replace the
switch.
Switch positionTerminal
CLOSEOPEN
± BODY ELECTRICAL SYSTEMMoon RoofBE±61

(b) Connect the positive lead from the battery to termi-
nal 1 and±negative (±y lead to terminal 5, check that
the motor turns to close. Then, reverse the polarity,
check that the motor turns to open. 1f motor does not
operate, remove and test the motor.
If circuit operation is correct, replace the relay.
Push sun roof switch to except CLOSE
Push sun roof switch to except OPEN Push sun roof switch to CLOSE
Push sun roof switch to OPEN Turn ignition switch OFFTurn ignition switch ON
Push limit switch ON
Push limit switch OFFSpecified value Tester
connection
10 ± Body ground
12 ± Body ground8 ± Body ground 4 ± Body ground
6 ± Body ground
7 ± Body groundBattery voltage
No continuity
No continuity No continuity
Continuity Continuity
Continuity
Continuity Continuity
Continuity No.voitage
Continuity Continuity
Continuity Continuity
ConditionCheck for
Voltage
± BODY ELECTRICAL SYSTEMMoon RoofBE±62

1. INSPECT RELAY OPERATION (ANTENNA UP)
(a) Connect the voltmeter positive (+) lead to terminal 1
and the negative (±) lead to terminal 4.
(b) Connect the positive (+) lead from the battery to terminals
6, 7 and 8. Connect the negative (±) lead to terminal 3.
(c) Check that there is battery voltage.
HINT: Measure the voltage within 7 seconds after con±
necting the positive (+) battery lead to terminals 8.
2. INSPECT RELAY OPERATION (ANTENNA DOWN)
(a) Connect the voltmeter positive (+) lead to terminal 4
and the negative (±) lead to terminal 1.
(b) Connect the positive (+) lead from the battery to terminals
6 and 7. Connect the negative (±) lead to terminal 2.
(e) Disconnect the positive (+) battery lead from terminal 6.
(d) Check that there is battery voltage.
HINT: Measure the voltage within 7 seconds after disconnect±
ing the positive (+) battery lead from terminal 6.
3. INSPECT RELAY OPERATION (ANTENNA STOP)
(a) Connect the voltmeter positive (+) lead to terminal 1
and the negative (±) lead to terminal 4.
(b) Connect the positive (+) lead from the ±battery to termi-
nals 7 and 9. Connect the negative (±) lead to terminal 2.
(c) Check that there is no battery voltage.
If operation is not as specified, replace the relay.
Antenna Motor
INSPECTION OF ANTENNA MOTOR
INSPECT LIMIT SWITCH OPERATION
(a) If the motor stops with the antenna up, check that
there is no continuity between terminals A±2 and
B±1.
(b) If the motor stops with the antenna down, check that
there is no continuity between terminals A±3 and
B±1.
If continuity is not as specified, replace the motor.
Antenna Motor Control Relay
INSPECTION OF ANTENNA MOTOR
CONTROL RELAY
± BODY ELECTRICAL SYSTEMAudio SystemBE±102

5. INSPECT SOLENOID RELAY OPERATION
(a) Apply battery voltage to terminals 1 and 3.
(b) Check that there is continuity between terminals 4
and 5.
(c) Check that there is no continuity between terminals 2
and 4.
If operation is not as specified, replace the relay.
6. INSTALL TWO CONTROL RELAYS4. INSPECT SOLENOID RELAY CONTINUITY
(a) Check that there is continuity between terminals 1
and 3.
(b) Check that there is continuity between terminals 2
and 4.
(c) Check that there is no continuity between terminals 4
and 5.
If continuity is not as specified, replace the relay. 2. INSPECT PUMP MOTOR RELAY CONTINUITY
(a) Check that there is continuity between terminals 1
and 2.
(b) Check that there is no continuity between terminals
3 and 4.
(c) Check that there is no continuity between terminals
1 and 4.
If continuity is not as specified, replace the relay.
3. INSPECT PUMP MOTOR RELAY OPERATION
(a) Apply battery voltage to terminals 1 and 2.
(b) Check that there is continuity between terminals 3
and 4.
(c) Check that there is no continuity between terminals
1 and 4.
If operation is not as specified, replace the relay.
Control Relays
INSPECTION OF CONTROL RELAYS
1. REMOVE CONTROL RELAYS
Remove the two control relays from the actuator.
± BRAKE SYSTEMAnti±lock Brake System (A.B.S.)BR±93

1. INSPECT RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity between
terminals 1 and 3.
(b) Check that there is continuity between terminals 2 and
4.
(c) Check that there is no continuity between terminals 4
and 5.
If continuity is not as specified, replace the relay.
2. INSPECT RELAY OPERATION
(a) Apply battery voltage across terminals 1 and 3.
(b) Using an ohmmeter, check that there is continuity between
terminals 4 and 5.
(e) Check that there is no continuity between terminals 2
and 4.
If operation is not as specified, replace the relay.
ENGINE MAIN RELAY
INSPECTION OF ENGINE MAIN RELAY
LOCATION:
3S±FE In the relay box in the engine compartment.
2VZ±FE On the LH fender apron rear side in the engine
compartment.
± CHARGING SYSTEMEngine Main RelayCH±16

INSPECTION OF ELECTRIC COOLING
FAN COMPONENTS
1. INSPECT WATER TEMPERATURE SWITCH
LOCATION: On the water inlet housing.
(a) Using an ohmmeter, check that there is no continuity be-
tween the terminal and body when the coolant
temperature is above 93°C (199°F).
(b) Check that there is continuity between the terminal and body
when the coolant temperature is below 83°C
(181 °F).
If continuity is not as specified, replace the switch.
2. INSPECT COOLING FAN RELAY (ºFAN NO.1 º)
A. Inspect relay continuity
(a) Using an ohmmeter, check that there is continuity
between terminals 1 and 2.
(b) Check that there is continuity between terminals 3 and
4.
If continuity is not as specified, replace the relay.
4. INSPECT COOLING FAN MOTOR
(a) Connect battery and ammeter to the fan motor connector.
(b) Check that the fan motor rotates smoothly, and check the
reading on the ammeter.
Standard amperage:
3.2± 4.4A 2WD M/T
5.8 ± 7.4 A 2WD A/T and 4WD M/T
8.8 10.8A 4WD A/T B. Inspect relay operation
(a) Apply battery voltage across terminal 1 and 2.
(b) Using an ohmmeter, check that there is no continuity be-
tween terminals 3 and 4.
If operation is not as specified, replace the relay.
3. INSPECT ENGINE MAIN RELAY (See page CH±16)
High Temperature (Above 935C (1995F))
4. START ENGINE
(a) Raise coolant temperature to above 93°C (199°F).
(b) Check that the fan rotates.
If not, replace the water temperature switch.
± COOLING SYSTEMElectric Cooling Fan (3S±FE)CO±22

ON±VEHICLE INSPECTION
Low Temperature (Below 85
°C (185°F))
1. TURN IGNITION SWITCH ºONº
Check that the fans stop.
If not, check the cooling fan relays and water temperature
sensor, and check for a separated connector or severed wire
between the cooling fan relay and water temperature
sensor.
2. DISCONNECT WATER TEMPERATURE SENSOR
CONNECTOR
Check that the fans rotate.
If not, check the cooling fan relays, fan motor, engine main
relay and fuse, and check for a short circuit between the
cooling fan relay and water temperature sensor.
3. CONNECT WATER TEMPERATURE SENSOR
CONNECTOR
INSPECTION OF ELECTRIC COOLANT
FAN COMPONENTS
1. INSPECT COOLING FAN ECC FOR CIRCUIT
Disconnect the cooling fan ECU, and check the connec-
tor on the wiring harness side as shown in the chart on the
next page.
High Temperature (85 ± 90°C (185±194°F))
4. START ENGINE
(a) Raise coolant temperature to 85 ± 90°C (185 ±194°F).
(b) Check that the fans rotate. (at low speed)
If not, replace the water temperature sensor.
High Temperature (Above 90°C (194°F))
5. START ENGINE
(a) Raise coolant temperature to above 90
°C (194°F).
(b) Check that the fans rotate. (at high speed)
If not, replace the water temperature sensor.
± COOLING SYSTEMElectric Cooling Fans (2VZ±FE)CO±24

5. INSPECT NO±2 COOLING FAN RELAY
(ºAC FAN NO.2º)
A. Inspect relay continuity
(a) Using an ohmmeter, check that there is continuity between
terminals 2 and 6.
(b) Check that there is continuity between terminals 1 and 3.
(c) Check that there is no continuity between terminals 1
and 4.
If continuity is not as specified, replace the relay. 2. INSPECT WATER TEMPERATURE SENSOR
Using an ohmmeter, measure the resistance between the
terminals.
Resistance:
Approx. 1.53 k
at 80°C (176° F)
Approx. 1.18 k
at 90°C (194° F)
Approx. 1.03 k
at 95°C (203°F)
If resistance is not as specified, replace the sensor.
3. INSPECT ENGINE MAIN RELAY (See page CH±16)
4. INSPECT NO.1 COOLING FAN RELAY (ºFAN NO.1 º)
(See page CO±22)
Ignition switch ON Ignition switch ON Tester connectionSpecified valve Condition
Battery voltageBattery voltage
Coolant temp.
Continuity
ContinuityContinuity ResistanceContinuity Check for
Voltage
Voltage
± COOLING SYSTEMElectric Cooling Fans (2VZ±FE)CO±25